Numerical Investigation of Hydrodynamics and Cohesive Sediment Transport in Cua Lo and Cua Hoi Estuaries, Vietnam

Two-dimensional models of large spatial domain including Cua Lo and Cua Hoi estuaries in Nghe An province, Vietnam, were established, calibrated, and verified with the observed data of tidal level, wave height, wave period, wave direction, and suspended sediment concentration. The model was then app...

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Autores principales: Viet Thanh Nguyen, Minh Tuan Vu, Chi Zhang
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Lenguaje:EN
Publicado: MDPI AG 2021
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Acceso en línea:https://doaj.org/article/fbef364b1887405d874a6088dc6d364f
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spelling oai:doaj.org-article:fbef364b1887405d874a6088dc6d364f2021-11-25T18:04:51ZNumerical Investigation of Hydrodynamics and Cohesive Sediment Transport in Cua Lo and Cua Hoi Estuaries, Vietnam10.3390/jmse91112582077-1312https://doaj.org/article/fbef364b1887405d874a6088dc6d364f2021-11-01T00:00:00Zhttps://www.mdpi.com/2077-1312/9/11/1258https://doaj.org/toc/2077-1312Two-dimensional models of large spatial domain including Cua Lo and Cua Hoi estuaries in Nghe An province, Vietnam, were established, calibrated, and verified with the observed data of tidal level, wave height, wave period, wave direction, and suspended sediment concentration. The model was then applied to investigate the hydrodynamics, cohesive sediment transport, and the morphodynamics feedbacks between two estuaries. Results reveal opposite patterns of nearshore currents affected by monsoons, which flow from the north to the south during the northeast (NE) monsoon and from the south to the north during the southeast (SE) monsoon. The spectral wave model results indicate that wave climate is the main control of the sediment transport in the study area. In the NE monsoon, sediment from Cua Lo port transported to the south generates the sand bar in the northern bank of the Cua Hoi estuary, while sediment from Cua Hoi cannot be carried to the Cua Lo estuary due to the presence of Hon Ngu Island and Lan Chau headland. As a result, the longshore sediment transport from the Cua Hoi estuary to the Cua Lo estuary is reduced and interrupted. The growth and degradation of the sand bars at the Cua Hoi estuary have a great influence on the stability of the navigation channel to Ben Thuy port as well as flood drainage of Lam River.Viet Thanh NguyenMinh Tuan VuChi ZhangMDPI AGarticlehydrodynamicssuspended sediment concentrationcohesive sediment transportmonsoonCua Lo estuaryCua Hoi estuaryNaval architecture. Shipbuilding. Marine engineeringVM1-989OceanographyGC1-1581ENJournal of Marine Science and Engineering, Vol 9, Iss 1258, p 1258 (2021)
institution DOAJ
collection DOAJ
language EN
topic hydrodynamics
suspended sediment concentration
cohesive sediment transport
monsoon
Cua Lo estuary
Cua Hoi estuary
Naval architecture. Shipbuilding. Marine engineering
VM1-989
Oceanography
GC1-1581
spellingShingle hydrodynamics
suspended sediment concentration
cohesive sediment transport
monsoon
Cua Lo estuary
Cua Hoi estuary
Naval architecture. Shipbuilding. Marine engineering
VM1-989
Oceanography
GC1-1581
Viet Thanh Nguyen
Minh Tuan Vu
Chi Zhang
Numerical Investigation of Hydrodynamics and Cohesive Sediment Transport in Cua Lo and Cua Hoi Estuaries, Vietnam
description Two-dimensional models of large spatial domain including Cua Lo and Cua Hoi estuaries in Nghe An province, Vietnam, were established, calibrated, and verified with the observed data of tidal level, wave height, wave period, wave direction, and suspended sediment concentration. The model was then applied to investigate the hydrodynamics, cohesive sediment transport, and the morphodynamics feedbacks between two estuaries. Results reveal opposite patterns of nearshore currents affected by monsoons, which flow from the north to the south during the northeast (NE) monsoon and from the south to the north during the southeast (SE) monsoon. The spectral wave model results indicate that wave climate is the main control of the sediment transport in the study area. In the NE monsoon, sediment from Cua Lo port transported to the south generates the sand bar in the northern bank of the Cua Hoi estuary, while sediment from Cua Hoi cannot be carried to the Cua Lo estuary due to the presence of Hon Ngu Island and Lan Chau headland. As a result, the longshore sediment transport from the Cua Hoi estuary to the Cua Lo estuary is reduced and interrupted. The growth and degradation of the sand bars at the Cua Hoi estuary have a great influence on the stability of the navigation channel to Ben Thuy port as well as flood drainage of Lam River.
format article
author Viet Thanh Nguyen
Minh Tuan Vu
Chi Zhang
author_facet Viet Thanh Nguyen
Minh Tuan Vu
Chi Zhang
author_sort Viet Thanh Nguyen
title Numerical Investigation of Hydrodynamics and Cohesive Sediment Transport in Cua Lo and Cua Hoi Estuaries, Vietnam
title_short Numerical Investigation of Hydrodynamics and Cohesive Sediment Transport in Cua Lo and Cua Hoi Estuaries, Vietnam
title_full Numerical Investigation of Hydrodynamics and Cohesive Sediment Transport in Cua Lo and Cua Hoi Estuaries, Vietnam
title_fullStr Numerical Investigation of Hydrodynamics and Cohesive Sediment Transport in Cua Lo and Cua Hoi Estuaries, Vietnam
title_full_unstemmed Numerical Investigation of Hydrodynamics and Cohesive Sediment Transport in Cua Lo and Cua Hoi Estuaries, Vietnam
title_sort numerical investigation of hydrodynamics and cohesive sediment transport in cua lo and cua hoi estuaries, vietnam
publisher MDPI AG
publishDate 2021
url https://doaj.org/article/fbef364b1887405d874a6088dc6d364f
work_keys_str_mv AT vietthanhnguyen numericalinvestigationofhydrodynamicsandcohesivesedimenttransportincualoandcuahoiestuariesvietnam
AT minhtuanvu numericalinvestigationofhydrodynamicsandcohesivesedimenttransportincualoandcuahoiestuariesvietnam
AT chizhang numericalinvestigationofhydrodynamicsandcohesivesedimenttransportincualoandcuahoiestuariesvietnam
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